How to Mold an Arm on a Budget


How to Mold an Arm on a Budget

My newest project is creating the Witchblade, which is from a very famous comic book series. For this, I needed to have a mold of my model’s arm, so that I could sculpt directly on top of that. By doing this, the Witchblade will fit her perfectly.

My first challenge was that I needed to make this mold on a time basis, and of course I didn’t have enough alginate to make the mold. In general, I would suggest if you want an arm to make a tube mold. Make a cylinder that is wide enough to have your fingers spread open in. Pour about 1-2 pounds of alginate into that mold, and then stick your arm in as far as you want the mold. Let it set up, pull your arm out, and then pour ultracal into your mold.

If you don’t have that amount of alginate, like I did, then you can try it out this way! Be forewarned, all my fingers broke off. I’m not baking this hand and making this glove out of silicone, so I’m not going to worry about the glued on fingers.


I had my model hold out her hand palm up, and covered as much of her hand as possible with the first mix of alginate that I mixed up. Particularly pay attention to keeping the alginate as thick as possible around the fingers.


Once your first layer is set up and thick, flip the hand over and do the same to the back side.


Here’s the fun part! I went over her palm in another layer really quick, making sure that the palm was as thick as possible. I then had her lay her hand down on a plastic wrapped surface, and then poured the alginate over her hand. I continually made certain that the alginate was thick all over her hand until it set up. It created this type of mitt.


I then wrapped the whole thing up in about 4 layers of plaster gauze. Once the outside gauze layer is dry, pour ultracal into the whole thing and let that set up for at least 3 hours.


Like I said previously, all my fingers snapped off as I was taking the mold apart. I think this was partly me being too rough and the ultracal not being completely set up. I glued the fingers back on using E-6000, and we’re good to go!

How to Mold an Arm on a Budget

My sculpting is a work in progress, if you’d like to see the rest of the costume, check out my portfolio for updates!


  1. Jessica
    September 15, 2014 at 8:26 pm

    Wowo how long did the model have all that stuff on her hands for ?

      September 15, 2014 at 8:28 pm

      Maybe a half an hour? The alginate sets up in about 10 minutes depending on the kind that you buy! The rest of the time is spent wrapping in plaster gauze!

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